ModelsModel releaseLarge Language Models · Multimodal Models · Reasoning & Planning1 source · Sep 29, 2026

Sonnet 5.5 is worth a try

I’ll be at OpenAI DevDay today.

Proof1 independent outlet

Key points

  • I also have my Stanford talk later today, and I’ve been up since 2am 😩, I don’t usually suffer with jet-lag so what a great day for it 🙃.
  • Google Cloud starts Season 3 of Advent of Agents this Thursday, Oct 1: one question a day about running agents securely in production, from agent identity to kill switches, with a short video and code you can build with your coding agent.
  • Anthropic released Claude Sonnet 5.5 - Sonnet 5.5 looks like a capable model based on benchmarks - close to Opus 5.5 in coding and a big jump in understanding images/charts etc. If you’re on the $20 plan, try replacing some of your usual asks from Opus to Sonnet 5.5 at high thinking.
  • ps: Anthropic has a track record of making the .5 version of Sonnet models really good.

Sources (1)

  • [1]Sonnet 5.5 is worth a try
    Ben's Bites · Sep 29, 01:01 PM
    I’ll be at OpenAI DevDay today.
    I also have my Stanford talk later today, and I’ve been up since 2am 😩, I don’t usually suffer with jet-lag so what a great day for it 🙃.

Extractive summary: sentences quoted from the sources.

Before this

  1. Sep 29, 2026The Era of Personal Super-Intelligent Agents
  2. Sep 29, 2026DevDay 2026 Recap
  3. Sep 29, 2026[AINews] AMD buys World Labs for $8.2B, as Atlas solves sparse reconstruction problem for robotics, design and more
  4. Sep 29, 2026[AINews] Opus 5.5 is good at explainer videos
  5. Sep 29, 2026Claude Code’s Next Era — Thariq Shihipar, Anthropic
  6. Sep 28, 2026Holo4: powering generalist computer-use agents

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